Backdoor_Win32_Fynloski_K

YARA detection rule by roadwy

Backdoor:Win32/Fynloski.K,SIGNATURE_TYPE_PEHSTR,0b 00 0b 00 0b 00 00

rule Backdoor_Win32_Fynloski_K{
	meta:
		description = "Backdoor:Win32/Fynloski.K,SIGNATURE_TYPE_PEHSTR,0b 00 0b 00 0b 00 00 "
		
	strings :
		$a_01_0 = {23 42 4f 54 23 56 69 73 69 74 55 72 6c } 		$a_01_1 = {23 42 4f 54 23 4f 70 65 6e 55 72 6c } 		$a_01_2 = {23 42 4f 54 23 50 69 6e 67 } 		$a_01_3 = {23 42 4f 54 23 52 75 6e 50 72 6f 6d 70 74 } 		$a_01_4 = {23 42 4f 54 23 43 6c 6f 73 65 53 65 72 76 65 72 } 		$a_01_5 = {23 42 4f 54 23 53 76 72 55 6e 69 6e 73 74 61 6c 6c } 		$a_01_6 = {23 42 4f 54 23 55 52 4c 55 70 64 61 74 65 } 		$a_01_7 = {23 42 4f 54 23 55 52 4c 44 6f 77 6e 6c 6f 61 64 } 		$a_01_8 = {44 44 4f 53 48 54 54 50 46 4c 4f 4f 44 } 		$a_01_9 = {44 44 4f 53 53 59 4e 46 4c 4f 4f 44 } 		$a_01_10 = {44 44 4f 53 55 44 50 46 4c 4f 4f 44 } 	condition:
		((#a_01_0  & 1)*1+(#a_01_1  & 1)*1+(#a_01_2  & 1)*1+(#a_01_3  & 1)*1+(#a_01_4  & 1)*1+(#a_01_5  & 1)*1+(#a_01_6  & 1)*1+(#a_01_7  & 1)*1+(#a_01_8  & 1)*1+(#a_01_9  & 1)*1+(#a_01_10  & 1)*1) >=11
 
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

af175a54-9fc1-448f-8444-748a8fc40cdd

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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